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Finding the Fourth Proportional to 118,405.61, 163,402.10 and 64,693.96

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Solution

The fourth proportional to 118,405.61, 163,402.10 and 64,693.96 is: 89,278.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,405.61 : 163,402.10 = 64,693.96 : x
  2. Step 2: Convert to fraction form
    118,405.61/163,402.10 = 64,693.96/x
  3. Step 3: Cross multiply
    118,405.61x = 163,402.10 × 64,693.96
  4. Step 4: Simplify right side
    118,405.61x = 10,571,128,921.32
  5. Step 5: Solve for x
    x = 10,571,128,921.32/118,405.61
  6. Step 6: Final answer
    x = 89,278.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.